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Communication Dans Un Congrès Année : 2012

Experimental and modeling of isothermal crystallization of peek matrix and c/peek composites with application of parallel Avrami model

Olivier de Almeida
Gérard Bernhart

Résumé

Isothermal crystallization kinetics of neat PEEK (Poly(Ether-EtherKetone)) and carbon fibers reinforced PEEK (30% in mass) were studied and modeled. A differential scanning calorimeter was used to monitor heat flow during isothermal crystallization between 300°C and 310°C. PEEK thermoplastic polymer exhibits a particular crystallization that induces a double melting peak after isothermal crystallization that is described by a model that features two competing nucleation and growth mechanisms. Concerning neat PEEK and reinforced PEEK respectively, the first mechanism is a primary crystallization with Avrami's coefficient of 2.1 (resp.3.2), the second is interlamellar crystallization with Avrami's coefficient of 1.7 (resp. 2.7). Kinetics parameters are identified, and confirm the influence of fibers on crystallization kinetic.
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hal-01760266 , version 1 (23-02-2021)

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  • HAL Id : hal-01760266 , version 1

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Emeline Bessard, Olivier de Almeida, Gérard Bernhart. Experimental and modeling of isothermal crystallization of peek matrix and c/peek composites with application of parallel Avrami model. ECCM 15 -15th European Conference on Composite Materials, Jun 2012, Venice, Italy. 7 p. ⟨hal-01760266⟩
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